feat(02-02): capture, scrub, and strictly diff stateful flows

Resolve named placeholders from a private variable store, mask
dates and ids after shape checks, and keep comparing independent steps.

Co-authored-by: Cursor <cursoragent@cursor.com>

tide/flow.go

@@ -74,6 +74,8 @@ type RecordConfig struct {
 	Target  string
 	Client  *http.Client
 	MaxBody int64
+	Store   *Store
+	Rules   Rules
 }
 
 // ReplayConfig injects the HTTP target, client and body bound for replay.
@@ -81,6 +83,7 @@ type ReplayConfig struct {
 	Target  string
 	Client  *http.Client
 	MaxBody int64
+	Store   *Store
 }
 
 // Result is the outcome of replaying a flow.
@@ -91,9 +94,10 @@ type Result struct {
 
 // StepResult is the outcome of one replayed step.
 type StepResult struct {
-	ID    string
-	OK    bool
-	Diffs []Diff
+	ID      string
+	OK      bool
+	Skipped bool
+	Diffs   []Diff
 }
 
 // Diff is one structural JSON or raw-byte mismatch.